000 00301nam a2200109Ia 4500
008 230411s9999 xx 000 0 und d
082 _a005.42
_bBEC
100 _aBECK (LELAND C.):
245 0 _aSystem Software : An Introduction to System & Programming
260 _b PEARSON
_a New Delhi
942 _cBK
999 _c2243
_d2243